Thermal fluctuations in viscous cosmology
General Relativity and Quantum Cosmology
2010-03-30 v3
Abstract
In this paper we investigate the power spectrum of thermal fluctuations in very early stage of viscous cosmology. When the state parameter as well as the viscous coefficient of a barotropic fluid is properly chosen, a scale invariant spectrum with large non-Gaussianity can be obtained. In contrast to the results previously obtained in string gas cosmology and holographic cosmology, we find the non-Gaussianity in this context can be k-independent such that it is not suppressed at large scale, which is expected to be testified in future observation.
Cite
@article{arxiv.1001.5152,
title = {Thermal fluctuations in viscous cosmology},
author = {Wei-Jia Li and Yi Ling and Jian-Pin Wu and Xiao-Mei Kuang},
journal= {arXiv preprint arXiv:1001.5152},
year = {2010}
}
Comments
13 pages, no figure, typos corrected, references added